Don't let the product name mislead you, just because it's called WIN-keyer doesn't mean it's only for the Windows operating system. There are lots of great Mac applications that support WKUSB. Thanks to Jim Rogers W4ATK, we can now offer WK24Mac and WK2CFGMac for the MAC. These apps are very similar to the K1EL apps WKdemo and WK2MGR. Now MAC owners are able to build and test WKUSB without using Windows (YEA!) Once you get WKUSB working you can then use WK2CFGMac to easily setup your WKUSB for standalone operation.